public void addConstructor(Constructor<?> constructor) throws Exception {
List<Type> paramTypes = new ArrayList<Type>();
for (Class<?> paramType : constructor.getParameterTypes()) {
paramTypes.add(Type.getType(paramType));
}
String methodDescriptor =
Type.getMethodDescriptor(Type.VOID_TYPE, paramTypes.toArray(new Type[paramTypes.size()]));
String signature = signature(constructor);
MethodVisitor methodVisitor =
visitor.visitMethod(
Opcodes.ACC_PUBLIC, "<init>", methodDescriptor, signature, new String[0]);
methodVisitor.visitCode();
// this.super(p0 .. pn)
methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
for (int i = 0; i < constructor.getParameterTypes().length; i++) {
methodVisitor.visitVarInsn(
Type.getType(constructor.getParameterTypes()[i]).getOpcode(Opcodes.ILOAD), i + 1);
}
methodVisitor.visitMethodInsn(
Opcodes.INVOKESPECIAL, superclassType.getInternalName(), "<init>", methodDescriptor);
if (initDynamicObjectHelper != null) {
initDynamicObjectHelper.add(methodVisitor);
}
if (initConventionAwareHelper != null) {
initConventionAwareHelper.add(methodVisitor);
}
if (initMetaClass != null) {
initMetaClass.add(methodVisitor);
}
methodVisitor.visitInsn(Opcodes.RETURN);
methodVisitor.visitMaxs(0, 0);
methodVisitor.visitEnd();
}
/** Generates the signature for the given constructor */
private String signature(Constructor<?> constructor) {
StringBuilder builder = new StringBuilder();
if (constructor.getTypeParameters().length > 0) {
builder.append('<');
for (TypeVariable<?> typeVariable : constructor.getTypeParameters()) {
builder.append(typeVariable.getName());
for (java.lang.reflect.Type bound : typeVariable.getBounds()) {
builder.append(':');
visitType(bound, builder);
}
}
builder.append('>');
}
builder.append('(');
for (java.lang.reflect.Type paramType : constructor.getGenericParameterTypes()) {
visitType(paramType, builder);
}
builder.append(")V");
for (java.lang.reflect.Type exceptionType : constructor.getGenericExceptionTypes()) {
builder.append('^');
visitType(exceptionType, builder);
}
return builder.toString();
}